Tube working tool



y 5, 1953 R. n. MOINTWOSH 2,637,227

TUBE WORKING TOOL Filed Sept. 9, 1949 I!!! ll/IIIIIIII IN VEN TOR.

fiaierZfi/YofuZZa/a BY J W1 Patented May 5, 19.53

UNITED PATENT CFFI'CE' Robert D. McIntosh; River Forest, Kit, assignor to The aces M mi-ion of ,Illinois Anplieatioirsenternher 9, 19 29; Serial 'No. 11143719 (Cl. i RS) 2.: Glairns; 1.

This invention relates torreaming relatively small tubes.

The general object-of the invention is to pro-- vide an-improvedtuhe working tool.

Another object of 'the inveis to provide atube'working tool with a'body member having a reamer fixedly-mounted thereon and a sheath member slida-bly a second terminal position wherein a portionof thereamerprojects out 'o-f the sheath member.

Another objectis-to provide a tool of this character having-means for limiting the sliding movement of thesheath member: and spring for yieldably-biasing the shatli member to the first.

out-,the entirelength of the, conical portion of the-sheathmember when thesheath member, is in-.its second. terminal position;

Otherobjects and advantages oiithe invention will be apparent from the following specification and drawings, in which:

Fig. 1 is a side elevational view of a tube working tool embodying the features of this invention.

Fig. 2 is an end elevational view looking from the left of Fi 1.

Fig. 3 is an enlarged fragmentary horizontal section along the line 3-3 of Fig. 1, showing the rearner in operation reaming a tube.

Fig. i is a horizontal section along the line 6-6 of Fig. 3.

Tube cutting tools of the type illustrated in Fig. 1 are commonly used for cutting relatively small tubing of copper, aluminum, steel and the like, and generally the use of such tools results in small burrs or even dances in the bore of the tube. It is necessary for the workman to clear the flange or burrs from the tube with a reamer after the cutting operation. While a separate reainer tool may be carried by the workman in his tool box to a tube working tool andmore particularly to a hand-operated tool;

mounted thereon for movement between a" first terminal position wherein the reamer is housed within the sheath member and said walls on opposite sides.

Imperial Brass Itianutacturing Company;

2 orhis pocket; it is much-more convenient 1301110013.- porate the rearner with the cutting tool. However, the rearner blade sl'loulf. normally be in anout of the way position when the reainer isnot inuse; for protection or the workman. who handles the tool and for protection or the blade; and this is true'whetlierthe rearoer isincornorated in atube cutter or whether the reamer comprises a separate tool.

Referringnow more particularly to the draW-= ings, in ll ig; l the novelsstructureis-shown as being incorporated in a tube cutting tool, al'- though it will'be understood'that such a tool is not necessary to the invention, but merelyillustrates a preferred form. The tool comprises a body member it having an end wall portion H. The end wall carries a pair of rollers it'anol it lorsupporting a tube which is to be out, these rollers havingnotches as shown for receivinga flange which is sometimes found on the end of a: tube. As suggestedearlier; the body member need not necessarily comprise a portion of a tube cutting tool.

t the other end of the bcd'y' rnember is a shank portion iii providing a mounting and bearing for a movable cutter holding member it, whiohcarries abutting disc, it; The member: iii is -1nov-- able longitudinally of the shank by means o-f-a'.

handle i l for cuttinga tube which issupportedon .the'rollers I2 and till The bodymember lil'has a cylindrical end por-- tion -23 which may be 'WBidGdOI otherwise secured thereon or which be formed integrally with: the body member, a reamer designated gen-. erally' at 25 isfixedly mounted'onthe end-per tion. The reamer has a pointed v-shaped. blade 22, the sides of which are beveled as indicated at 23 to form leading cutting edges. A sheath member designated generally at 23 has a cylindrical portion 25 and a tube-engaging end 26 with conical walls. A slot 2"? contains the reamer and extends from the apex of the conical portion and opens through the conical walls on opposite sides throughout the entire length of the conical portion as seen best in Fig. l.

The cylindrical portion 25 of the sheath is slidably mounted on the cylindrical end portion so of the body member, and the sheath is movable between a normal or first position, as shown in Fig. 1, wherein the reamer "at is housed within the sheath member, and a second terminal position, as shown in Figs. 3 and 4, wherein the point of the blade 22 projects beyond the apex of the sheath member (see Fl i) and wherein the cutting edges project out of the slot throughout the entire length of the conical portion as shown best in Fig. 3.

A compression spring 30 abuts a shoulder a on the body portion 20 and a shoulder a on the sheath member, and yieldably biases the sheath member to the first terminal position of Fig. l.

A longitudinally extending elongated slot 3| is provided in the sheath member and a stud 32 is mounted on the portion 20 of the body and extends into the elongated slot for limiting sliding movement of the sheath member. As shown in Fig. 4, the stud 32 may also anchor the reamer 2| on the portion 20.

In the operation of the device, the tension of the spring 3| normally biases the sheath member to the first terminal position of Fig. 1 so that the reamer blade does not project out of the slot 21, thus affording protection both to the blade and to a workman who may handle the tool. When it is desired to ream a burr from the bore of a tube, as the tube 35 shown in Figs. 3 and 4, the conical tube-engaging portion of the reamer is inserted into the bore of the tube and the reamer is rotated, while at the same time force is applied to push the reamer into the tube. This force compresses the spring 38 so that the parts assume the position of Figs. 3 and 4 with the point of the reamer and the cutting edges projecting out of the slot 21. Inasmuch as the sides of the blade are beveled, the blade will have leading cutting edges and the blade should be rotated in a direction (preferably clockwise) to cause these leading edges to ream the burr from the tube. Upon removal of the tool from the tube the spring 38 will automatically restore the parts to the position of Fig. 1.

While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims.

I claim as my invention:

1. A tube working tool comprising a body member having a projecting end portion; a reamer member fixedly mounted on said end portion, said reamer having a pointed V-shaped blade the sides of which form cutting edges; a sheath member having a tube-engaging end with a symmetrical pair of conical shaped walls converging toward an apex and a slot containing said reamer and extending from the apex and opening through said walls on opposite sides throughout the entire length of the conical portion thereof, said sheath member being slidably mounted on said end portion for movement between a first terminal position wherein said reamer is entirely housed within said sheath member and a second terminal position wherein the point of said blade projects beyond the apex of said sheath member and wherein said cutting edges project out of said slot throughout the entire length of said conical portion; means in said projecting end portion for limiting sliding movement of said sheath member and anchoring said reamer member in said end portion; and spring means for yieldably biasing said sheath member to said first terminal position.

2. A tube working tool comprising a body member having a cylindrical end portion containing a slot therein; a reamer member fixedly mounted in the slot of said end portion, said reamer having a pointed V-shaped blade the sides of which are beveled to form leading cutting edges; a sheath member having a cylindrical mounting portion and a tube-engaging end with a symmetrical pair of conical shaped walls converging toward an apex and a slot containing said reamer and extending from the apex and opening through said walls on opposite sides throughout the entire length of the conical portion thereof, the cylindrical portion of said sheath being slidably mounted on said end portion for movement between a first terminal position wherein said reamer is entirely housed within said sheath member and a second terminal position wherein the point of said blade projects beyond the apex of said sheath member and wherein said cutting edges project out of said slot throughout the entire length of said conical portion, said sheath having an elongated slot in its cylindrical portion; a stud mounted in the end portion of said body member and passing through said reamer, anchoring it to said body member, said stud extending into said elongated slot for limiting sliding movement of said sheath member at said terminal positions; and a spring for yieldably biasing said sheath member in said first terminal position.

ROBERT D. McINTOSH.

References Cited in the file of this patent UNITED STATES PATENTS 

